/// <summary>
/// 設置行政區
/// </summary>
/// <param name="district"></param>
public void SetRegionData(District district)
{
// 分割區域
m_district = district;
var lt = m_district.LeftTop.GetMercatorPoint();
var rb = m_district.RightBottom.GetMercatorPoint();
var zoom = lt.Zoom;
while (((rb.GetTilePoint().X - lt.GetTilePoint().X) > 2) || ((lt.GetTilePoint().Y - rb.GetTilePoint().Y) > 2))
{
zoom--;
lt = lt.GetMercatorPoint(zoom);
rb = rb.GetMercatorPoint(zoom);
}
// 加载瓦片
Tiles.Clear();
var tilePoint = lt.GetTilePoint();
Tiles.Add(new BitmapImage(new Uri(tilePoint.Address)));
Tiles.Add(new BitmapImage(new Uri(tilePoint.Right.Address)));
Tiles.Add(new BitmapImage(new Uri(tilePoint.Right.Right.Address)));
Tiles.Add(new BitmapImage(new Uri(tilePoint.Bottom.Address)));
Tiles.Add(new BitmapImage(new Uri(tilePoint.Bottom.Right.Address)));
Tiles.Add(new BitmapImage(new Uri(tilePoint.Bottom.Right.Right.Address)));
Tiles.Add(new BitmapImage(new Uri(tilePoint.Bottom.Bottom.Address)));
Tiles.Add(new BitmapImage(new Uri(tilePoint.Bottom.Bottom.Right.Address)));
Tiles.Add(new BitmapImage(new Uri(tilePoint.Bottom.Bottom.Right.Right.Address)));
// 加载区域線段
var wrappers = new ConcurrentBag <MapLineWrapper>();
Parallel.ForEach(m_district.Regions,
region =>
{
var points = region.Points.Select(o => o.GetMercatorPoint(zoom)).ToList();
Parallel.For(0,
points.Count - 1,
index =>
{
var point1 = new MapPointWrapper
{
X = points[index].X - tilePoint.X * 256,
Y = tilePoint.Y * 256 - points[index].Y + 256
};
var point2 = new MapPointWrapper
{
X = points[index + 1].X - tilePoint.X * 256,
Y = tilePoint.Y * 256 - points[index + 1].Y + 256
};
wrappers.Add(new MapLineWrapper(point1, point2));
});
});
RegionLines = new ObservableCollection <MapLineWrapper>(wrappers);
}
/// <summary>
/// 构造函数
/// </summary>
public MapLineWrapper(MapPointWrapper p1, MapPointWrapper p2)
{
Point1 = p1;
Point2 = p2;
}
